[Qgis-user] Projection of Shapefile export

[Brett Adams]

  Micha,
Sorry but I can't get your suggestions to work. I tried this a couple of 
times but it fails every time.

Settings->Options-CRS window is already set to "Prompt for CRS"

Tried changing the global to AGD84 / AMG zone 51, when I reopen the 
window its set to AGD66 so this setting is not holding.

When I reimport the the CSV file the default is still WGS84, despite the 
global been set to AGD84 (or is it AGD66, I can't be sure). Again I 
select AGD84.

Layer > Properties > Specify CRS comes up as AGD66. Changed it to AGD84

When I export the layer, I'm again asked to specify the projection, AGD84

Exported *.prj file still has a datum of "D_unknown". Upon import of the 
shape file, my version of QGIS will now default this to AGD84 however as 
the *.prj file is wrong it no good to anyone else.



The only real work around I have so far is to delete the *.prj file and 
then specify the projection on import.




On 19/09/2010 2:35 PM, Micha Silver wrote:
> Micha Silver wrote:
>
>> Brett Adams wrote:
>>
>>> Micha,
>>> I've attached csv data for importing and all shape files exported. 
>>> I've added comments into your prior email also.
>>>
>> Hi Brett:
>>
>> I do indeed see a problem exporting to the AGD84 CRS. I get a 
>> "Latitude or Longitude exceeds limits" error. This happens when the 
>> global CRS is set to WGS84 (which is the default in QGIS). Attached 
>> is a screen shot of the error.
>>
>> Here's how to overcome the problem: Change your Global CRS to AGD84 
>> zone 51 (BTW, that's EPSG code 20351). This is done in the 
>> Settings->Options->CRS dialog window. Now re-import the csv file and 
>> then save as shapefile and you should be able to select the AGD84 CRS 
>> and have it saved correctly.
>> Alternatively, if you don't want to change the global CRS setting, 
>> you can select (in the same Settings->Options-CRS window) to "Prompt 
>> for CRS".  Then when you import the csv you'll be asked to specify 
>> the correct CRS for the points, You again select AGD84 and all should 
>> be well.
>>
>> Cheers,
>> Micha
>>
> And just to complete the picture, Jurgen reminded me that in recent 
> versions there's a setting for each layer to set what CRS it is. This 
> is found in the Layer->properties window, General tab. Click on the 
> button "Specify CRS" and choose the correct coordinate system. You can 
> do this also for a delimited text file layer.  Then export to 
> shapefile works as you'd expect..


-- 
Brett Adams
Spinifex Geophysics
0438 861 974
SKYPE:brettadams_spinifex